The book is devoted to focus issues. Now you will learn about the true nature of those miracles that people have learned to repeat in front of a surprised crowd of spectators on stage. Many tricks are based on the ordinary laws of physics, for example, gravity. Some magicians build their illusions on the visual deception of the audience. This book tells about what tricks are - magic on Earth among us, or scientific experiments, the publication is aimed at inquisitive readers who, although know more about how this world works. The book also contains recipes for a number of interesting and little-known tricks. Tips are given on how to train so that experiments" work out.